Datacenter Sites in St. Johns County, Florida

St. Johns County has 17 scored datacenter candidate sites averaging 58.5/100 DC Readiness, with a catalogued aggregate of 2,200 MW. FEMA rates local natural-hazard risk as "Very High". The county has a datacenter tax incentive on record.

At a glance

St. Johns County, Florida has 17 scored datacenter candidate sites averaging 58.5/100 DC Readiness, roughly in line with the Florida average of 56.0. It ranks 50th of 66 Florida counties by number of sites and 3rd by average score. The top-scoring site is SAMPSON at 65.2/100.

17

Candidate sites

58.5/100

Avg DC Readiness

2,200 MW

Catalogued capacity

theoretical aggregate

Very High

Hazard rating

◆ Loading map…

≥ 7560–7540–60≤ 40

Top 17 in St. Johns County

Site-selection context for St. Johns County

Yessales_tax_exemption

Datacenter tax incentive

10.83¢/kWh

Commercial electricity

7.92¢/kWh

Industrial electricity

Fiber providers

Low-Medium

Water stress

$13,626

Land price / acre

3,500

Cooling degree days

700

Heating degree days

72°F

Mean annual temp

Incentive detail: Sales tax exemption on manufacturing machinery including servers; no state income tax.

How does St. Johns County compare with other counties in Florida?

By number of scored sites, St. Johns County ranks 50th of the 66 Florida counties with a county page, holding 0.4% of the state's 4,344 sites. Its average DC Readiness of 58.5/100 ranks 3rd in the state and is about 10% above the national average of 53.0. Nationally it has the 1896th-largest site inventory of 2,964 counties with five or more sites. 0 sites score 70 or higher and 14 score 55 or higher.

What types of datacenter sites are in St. Johns County?

Substation-Adjacent sites are the most common (14, 82% of the county's inventory), followed by greenfield (2) and former mine (1). Site type reflects how the parcel was identified — next to a substation, on a former mine or brownfield, on industrial or federal excess land — and is scored on the same 14 factors either way.

What are power cost, hazard, water and fiber conditions in St. Johns County?

Industrial electricity averages 7.92¢/kWh and commercial 10.83¢/kWh. FEMA's National Risk Index rates the county "Very High" (55). WRI water stress is low-medium. 8 fiber providers report service in the county. The climate runs 3,500 cooling degree days a year with a mean temperature of 72°F. Land is valued around $13,626 an acre.

By site type

Top datacenter sites in St. Johns County

Top datacenter sites in St. Johns County
Site	Type	Voltage	Capacity	Queue wait	Score
SAMPSON	Substation-Adjacent	230 kV	300 MW	3.7 yrs	65.2
UNKNOWN108281	Substation-Adjacent	230 kV	300 MW	3.7 yrs	63.7
ST. JOHNS	Substation-Adjacent	230 kV	300 MW	3.7 yrs	63.0
TOCOI	Substation-Adjacent	230 kV	300 MW	3.7 yrs	63.0
UNKNOWN108286	Substation-Adjacent	115 kV	100 MW	3.7 yrs	61.0
UNKNOWN108291	Substation-Adjacent	115 kV	100 MW	3.7 yrs	59.4
UNKNOWN108482	Substation-Adjacent	115 kV	100 MW	3.7 yrs	59.0
UNKNOWN108395	Substation-Adjacent	115 kV	100 MW	3.7 yrs	58.9
UNKNOWN108483	Substation-Adjacent	115 kV	100 MW	3.7 yrs	58.8
UNKNOWN120432	Substation-Adjacent	115 kV	100 MW	3.7 yrs	58.5
UNKNOWN108296	Substation-Adjacent	115 kV	100 MW	3.7 yrs	57.5
UNKNOWN120433	Substation-Adjacent	115 kV	100 MW	3.7 yrs	57.5
ELKTON	Substation-Adjacent	115 kV	100 MW	3.7 yrs	57.3
HASTINGS	Substation-Adjacent	115 kV	100 MW	3.7 yrs	57.1
OZ St. Johns	Greenfield	—	—	3.7 yrs	52.0
EC Coal St. Johns County	Greenfield	—	—	3.7 yrs	51.3
Mine Site	Former Mine	—	—	3.7 yrs	51.2

Every scored site in St. Johns County

All 17 sites, best first.

SAMPSON · 65.2
Substation-Adjacent site · cd0ba85b · 63.7
ST. JOHNS · 63.0
TOCOI · 63.0
Substation-Adjacent site · 4e5bde65 · 61.0
Substation-Adjacent site · 03490818 · 59.4
Substation-Adjacent site · 8839d920 · 59.0
Substation-Adjacent site · 8f7cbe3f · 58.9
Substation-Adjacent site · ef601c20 · 58.8
Substation-Adjacent site · 9d8a4c24 · 58.5
Substation-Adjacent site · b69ad5b2 · 57.5
Substation-Adjacent site · 9c681e4d · 57.5
ELKTON · 57.3
HASTINGS · 57.1
OZ St. Johns · 52.0
EC Coal St. Johns County · 51.3
Mine Site · 389d7aec · 51.2

St. Johns County datacenter FAQ

How many datacenter sites are in St. Johns County?

17 scored datacenter candidate sites, averaging 58.5/100 DC Readiness. That is the 50th-most of 66 Florida counties with five or more sites.

What is the highest-scoring datacenter site in St. Johns County?

SAMPSON scores 65.2/100 DC Readiness, the highest of the 17 scored sites in St. Johns County (a substation-adjacent site).

Does St. Johns County offer datacenter tax incentives?

Sales tax exemption on manufacturing machinery including servers; no state income tax.

What is the natural-hazard risk in St. Johns County?

FEMA's National Risk Index rates St. Johns County as "Very High" (score 55).

What are industrial electricity rates in St. Johns County?

Average industrial electricity is 7.92¢/kWh and commercial is 10.83¢/kWh in St. Johns County.

About this data

Source: GridCensus composite of HIFLD transmission and substation data, EIA, FEMA National Risk Index, FCC broadband data, PeeringDB and ISO interconnection queues, as published November 12, 2026 — GridCensus refreshes it monthly. See the methodology for how records are matched, cleaned and scored.

Cite as: GridCensus, “Datacenter candidate sites in St. Johns County, Florida”, https://gridcensus.com/datacenter-sites/florida/st-johns-county (data as of November 12, 2026).

Dataset updated November 2026. Screening estimates derived from public data sources.

Go deeper than the public screen

Every site and score for St. Johns County, Florida is free to browse. Pro adds Watchtower on 25 sites, alerts when new candidate sites, datacenters or interconnection-queue requests appear in your markets, score and capacity history, and CSV export. Enterprise adds team seats, weekly data files for all 147,272 sites, the REST API and an MCP server for AI tools.

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